Anything can be used to kill people, but to kill someone at close range when they are not tied up, asleep or drugged requires more than hands and feet. Since risk is involved is takes bit of bravery, thus, the coward relies on a gun (in fact, the possession of a gun makes a 'brave' man out of he coward).
Are you sure more is required than hands and feet?
" soccer referee who was punched by a player after calling a foul on him during a recreational soccer game in Utah died Saturday night, a week after he was hit once in the face. The suspect, who received a yellow card penalty from referee Ricardo Portillo, was arrested Monday and remains incarcerated, officials say."
Soccer Referee Dies, One Week After Being Felled By Punch : The Two-Way : NPR